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cfinput regular expression validation not working

Posted on 2009-04-10
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Last Modified: 2012-05-06
I can't get regular expressions to reject anything.  I noticed invalid times getting into the database.  I even created code that said the pattern was beer and typed in time in 00:00 format and it was not rejected.

using cfinput in coldfusion on linux running debian
<cfinput type="text" name="NOTIFIED" size="5" maxlength="5" value="#TimeFormat(Notified,"HH:mm")#" validate="regex" pattern="beer" message= "wrong">

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Question by:storeytime
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Expert Comment

by:duncancumming
ID: 24121135
validate="regex" uses Javascript.  Does your browser have Javascript enabled?  Of course any Javascript validation can be got round, so you'd also have to do server-side validation too.

Also regex validation only works on HTML forms, not on Flash forms.

You could change the type from regex to time, although I think that expects format of hh:mm:ss.

Alternatively instead of doing a regex, you could use the mask attribute, something like mask="99:99".


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by:storeytime
ID: 24121253
yes but the problem is i have people using incorrect times like hour 24:35 it doesn't exist.  so it causes database issues.  tried with firefox, Chrome, IE7
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Expert Comment

by:duncancumming
ID: 24121275
right, so that's a different problem from originally reported.  If you want to check the time is actually valid, use
IsValid("time", form.fieldname)

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by:storeytime
ID: 24121287
ok the problem is i can't get regular expression to validate anything

Im ean I ty pe in ^$ and I can type anything I want into the balnk and it takes it
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Expert Comment

by:_agx_
ID: 24123127
storeytime,

I assume you are using format="html".  In which case using validate="time" would work fine for your purposes - because you are using maxlength="5".  As long as javascript is enabled, the attached works correctly.   BUT, users can easily disable javascript. So in addition, you should also use server side validation on the action page, as Ducan suggests.

Also, with date and times you should use cfqueryparam or CreateDateTime to ensure the values are properly formatted before being sent to the database.






<cfform format="html">
	<cfinput type="text" name="NOTIFIED" size="5" maxlength="5" 
			validate="time" message= "wrong time">
	<cfinput type="submit" name="submitButton">
</cfform>

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Expert Comment

by:_agx_
ID: 24123139
> ok the problem is i can't get regular expression to validate anything

Probably because the validate value should be "regular_expression", not "regex"
<cfform format="html">
	<cfinput type="text" name="onlyNumbers" required="yes" validate="regular_expression"
			pattern="[0-5]" 
			message="Only numbers 1 through 5 are allowed!">
	
	<cfinput type="submit" name="submitButton">
</cfform>

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Expert Comment

by:_agx_
ID: 24123158
> Probably because the validate value should be "regular_expression", not "regex"

Oops. My mistake.  They changed it to allow both "regex" and "regular_expression".  If the above code does not work for you, then you should check whether _any_ cfform validation works.  For example, if a simple required="true" does not work:

<cfinput type="text" name="firstName" required="yes" message="First Name is required!">

... either javascript is disabled -or- there is a problem with the CFIDE directory/mapping (where the validation scripts are located).  

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Author Comment

by:storeytime
ID: 24127579
if you force onserver then the user readable message is not displayed using the message=" yada" parameter.  is there a way to display a user readable message or are you stuck with try formatting ^/A/d/d/d/d?/d$ for the message
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Expert Comment

by:_agx_
ID: 24129998
Whatever message you define is displayed if you use validate="time".  Apparently, it is not displayed for validate="reg_ex".  
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Author Comment

by:storeytime
ID: 24139024
you can use validateat="when to validate" to set one or multiple times to validate i know you get a little pop up window with javascript execution of the message statement but when javascript is disabled and you also force onserver then you do not get the message you get format not correct must be and then gives regular expression which to the end user is very cryptic
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Accepted Solution

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_agx_ earned 2000 total points
ID: 24139325
Yes, but it IS displayed when you use onserver  <cfinput validate="time" ...> on CF8.  Which should work fine for you.   Like I said above, for whatever reason the message is is _not_ displayed when you use onserver/validate="reg_ex".  I don't believe there is a way to change that.   So if you want a more readable error message, I believe you'll have to use validate="time" , or do the validation yourself with IsValid(...).  Those are pretty much all of your options for cfform.

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